Improvement in machines for boring hubs



UNITED STATES PATENT OEETCE.

L. A. DOLE, OF SALEM, OHIO, ASSIGNOR TO HIMSELF AND A. It. SILVER, OF

' SAME PLAGE.

IMPROVEMENT IN MACHINESIFOR'BORING HUBS.

Specification forming part of Letters Patent No. 53,216, dated March 13, 1866.

To all 'whom t may concern:

Beit known that I, L. A. DOLE, of Salem, in the county of Columbiana and- State of Ohio, have invented a new and Improved Machine for Boring Hubs; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part i of this specification, in which- Figure I, Sheet 1, is a front view of the chuck and boring tool combined. Fig. 2, Sheet I, is a longitudinal central section taken in a vertical plane through the machine. Fig. 3, Sheet l, is a face view of the scroll-disk for adjusting the sliding dogs ot' the chuck-plate. Fig. 4, Sheet l, is a front view of the chuck and its arms for supporting the rim of the wheel. Fig. 5 is a side elevation ot' Fig. 4. Fig. 6 is an end view, showing the adjustable bearing for the auger-shaft and its turning collar. Fig. 7 Sheet 2, is an enlarged diametrical section of the machine with the arms of the chuck-plate broken oft'. Fig. 8, Sheet 2, is an enlargedview of Fig. 6. Fig. 9, Sheet 2, shows one of the adjustable steppedbearngs of the arms of the chuck-plate.l Fig. l0 is a perspective view ot' the boring-tool applied to its shaft.

Similar .letters of reference indicate corresponding parts in all the gures.

This invention relates to certain novel improvements on machines for boring tapering hees through the hubs of wheels, wherein centering-chucks are employed in conjunction with cont-rivances for adjusting the auger-shaft and giving to it any desired angle with respect to the axis of the hub when secured in place.

The main object of my invention is to employ a single chuck-plate on one side of a supporting-frame in conjunction with an adjustable support applied to the opposite side of such frame for setting the auger-shaft at any desired angle, so that the contrivances for centering, holding, and boring the hubs will all be sustained upon a frame during' the operation of boring, as will be hereinafter described.

Another object of my invention is to provide for centering and securing wheels by their hubs, and also supporting them by their rims in a plane parallel to the chuck-plate for the purpose of boring tapering holes through the centers of the hubs, as will be hereinafter described.

'IO enable others skilled in the art to understand my invention, I will describe its construction and operation.

Previously to my invention machines for boring tapering holes through the hubs ot' wheels have been made with a contrivance for adjusting the auger-shaft out ot' a line coinciding with the axis of the hub, so that as the auger penetrated the hub it would bore a hole of gradually-increasing diameter, or a tapering hole. But the difficulty with such machines consists in not exactly centering the hubs with respect to the boring-tool, and also in preventing the hub and its wheel from vibrating or springing during the operation of boring. To remedy these and other objections to machines ot' this class which have been made, I employ a supporting-frame, A, which is mounted upon standards or legs A', as shown in Fig. 2. The frame A consists of a shell having cylindrical bearings c b formed on its ends, which project beyond. the bedplate or table of said frame. 'Ihe bearing b receives over it a cylindrical cap, c, through the collar or flange ot' which a pin, c', passes and enters an annular groove which is formed in the bearing b, thus connecting the cap to the bearing and allowing this cap to be rotated backward orforward. Through the end of said cap an oblong slot is made, which is covered by a sliding plate, c2, that extends dametrically across the cap and works between two parallel guides When the clamp-screw d is loosened. Through this slide c2 the smooth portion B of the auger-shaft passes, and this auger-shaft is prevented from turning in said hole or bearing by means of a key-tenon, e, which is formed on slide c2, and enters the longitudinal slot e in the smooth portion of the auger-shaft, as shown in Figs. 2, 7, and 8.

On the opposite end of the frame or hollow shell A I apply the contrivances for centering the hubs and securing them rigidly in place.

C represents a circular plate which turns loosely upon the tubular bearing a, and which is constructed with a volute or scroll ange,f, on one face, as clearly shown in Fig. 3. In

front of this disk C, and keyed to the bearing a, is a plate, D, which is adapted for receiving and supporting the three sliding dogs g g g, which are all moved toward or from the center of the plate D simultaneously by turning the disk C, the volute-flan ge of which engages with the teeth 7L, which are formed on the slides g g g of the dogs g, as shown in Figs. 2 and 7. The biting ends of said dogs are all equidistant from the center of the plate D, and when they are brought up against the cylindrical portion of ahub they not only center the hub, but confine it rigidly in place, so that when thus confined its axis will coincide with the axis of the shell A, rotary disk C, and chuckplate D, as shown in Fig. 7.

E E E are radial arms, which are secured at regular distances apart to the plate D, as shown in Fig. 4, and which are provided with stepped blocks or bearingsjj j, that are titted in slots la 7c k of said arms. Set-screws l are employed for clamping the blocksj to the arms at any desired point, according to the diameter of the wheels or the length of thehubs of the wheels which aro to be bored.

The blocksj are stepped for the purpose of adapting them to diii'erent-sized wheels, so that the blocks will afford bearings for the rims of the wheels, and thus enable me to arrange and secure the wheels in a plane parallel to the plane of the chuck-plate D.

The au ger-shaft B is supported at its forward end by a spherical nut, on, which is seatedin a socketin the forward end of the shell A or the bearing a of this shell, as shownin Figs.2, 3, and 7. This nut is kept in place by means of a tubular screw-cap, n, having a concave depression in one end, which is screwed into the end of the bearing a, and the nut m isprevented from turning about the axis of the auger-shaft, when this shaft is turned, by means of the fixed pin 'L'. (Shown in Figs. 2, 3, and 7.) This nutmis, however, allowed to oscillate and accommodate itself to the motions of the auger-shaft when this shaft is adjusted forboring a tapering hole, as shown in Figs. 2 and 7. The auger-shaft has a screw formed on a portion of its length, which is in tended for feeding the tool up to the work, the spherical bearing m serving as the nut for. said portion of the shaft.

The cutting-tool is constructed, as shown in Fig. 10, with a shank, p, that passes diametricall y through the end of the au ger-shaft, and which has two cutting-edges formed on it and arranged at such an angle to each other that one cutter plows away the wood directly in front of the shaft B, while the other cuts out the chips and leaves the sides of the hole smooth. The shank of the cutters is confined in place by means of a set-screw, s, as clearly shown in Figs. 2 and 7. On the rear end of the augershaft a crank-handle, B', is applied, by means of which this shaft is turned.

My machine obviates the necessity of using a chuck-support at each end of the frame. It also obviates the necessity of having a hubholder, which requires to be located forward of the cutting or boring tool. The distinguishing characteristic of my invention is the provision I have made in it for supporting both the hub-holder and boring-tool upon a single side of the frame A in such manner that the arrangement of the hub-holder forward ofthe cutter p, and so as to require an additional support or framevfor it to be erected upon the bedplate of the boring-tool frame, as in many machines is rendered wholly unnecessary, and thus great com pactness and simplicity, withincreased facility for manipulating the machine, are secured.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination of the fixed chuck-plate D, adjusting-plate G, hollow supporting-frame A, and the turning cap c, with its adjusting bearing-plate c2, substantially as described.

2. The combination of the scroll-adjustingplate G, chuck-plate D, oscillating-nut m, auger-shaft B, and adjustable bearing c2, substantially as described.

3. The radial arms E, provided with adjustable sliding' blocks jj, in combination with a @entering-Chuck and au ger-shaft, substantially as described.

L T116 stepped blocks j, when applied EO radial arms E, and used substantially as described.

L. A. DOLE.

Witnesses:

R. H. GAnRIGUEs, WM. H. GARRIGUES. 

